Thank you for submitting your feedback to the Designer Idea Board! This is fantastic feedback for our UX team. Just to confirm as well since some UX changed have been made recently, what version are you currently on?
@Not_That_Guy is right, any time I put the Explorer box into a container it is a real pain to grab the handles with them being so small. Especially when I am using the pad on the laptop instead of a mouse.
The Explorer Box resize handles are usually not that small, unless you are zoomed out. In that case, all of the resize handles on all of the canvas items (comments) would be the same size too. Is there something specific to Explorer Boxes being requested that I am not understanding?